BluOS 4.10.11 introduced a switch to enable/disable Spatial Audio.
When Spatial Audio is enabled, BluOS uses advanced Digital Signal Processing (DSP) for immersive (3D) audio in all scenarios including Home Theater Groups.
If the advanced DSP interferes with surround-speaker playback then disable Spatial Audio. You can re-enable this feature anytime.
The player will initiate an upgrade when this feature is activated or deactivated.
To enable/disable Spatial Audio on the P430 select Settings > Audio > Spatial Audio.
Mobile:
Desktop: